Power Amplifiers

X6.4

4-Channel Class-D Power Amplifier, 600W per Channel @ 4Ω

4 × 600W at 4Ω
Stable 2Ω Operation
Stereo, Mono, and Bridge Operating Modes
Four Channels with Independent Level Controls
Universal Switch-Mode Power Supply
Switchable 120Hz Low-Pass and High-Pass Filters
Comprehensive Protection Circuitry

Where to Buy

Overview

he Sound Barrier X6.4 is a compact four-channel Class-D power amplifier designed for permanent installations, houses of worship, conference facilities, entertainment venues, multi-zone audio systems, and smaller mobile or rental applications. It delivers 4 × 600W at 4Ω and 4 × 400W at 8Ω, providing dependable power for full-range loudspeakers, stage monitors, and compact subwoofer systems.

Stereo, mono, and bridge operating modes allow the X6.4 to accommodate a variety of system configurations, including up to 2 × 1200W bridged at 8Ω. Separate mode switches for channel pairs 1–2 and 3–4 provide additional flexibility. A switchable 120Hz low-pass filter on channels 1–2 and a 120Hz high-pass filter on channels 3–4 support subwoofer and satellite loudspeaker configurations.

A universal 100–240 VAC power supply with active Power Factor Correction supports operation across a wide range of electrical environments. Its lightweight 1U metal chassis, internal heat sinks, dual variable-speed cooling fans, comprehensive protection circuitry, and clear front-panel status indicators make the X6.4 a compact and cost-effective amplifier for professional applications.

KEY FEATURES

4 × 600W at 4Ω
Stable 2Ω Operation
Stereo, Mono, and Bridge Operating Modes
Four Channels with Independent Level Controls
Universal Switch-Mode Power Supply
Switchable 120Hz Low-Pass and High-Pass Filters
Comprehensive Protection Circuitry

Universal Power with Active PFC

The DA Series features a universal switch-mode power supply designed to operate from 100–240 VAC ±10%, 50/60Hz, allowing reliable use across a wide range of global power systems. Active Power Factor Correction (PFC) optimizes current draw, improves power efficiency, and helps maintain consistent amplifier performance under demanding operating conditions.

3 Year Warranty

Includes a 1-year standard limited warranty, extended to 3 years total at no additional cost when the product is registered within 90 days of purchase. Proof of purchase is required. Statutory consumer rights are not affected.

Specifications

Output Power

2Ω Stereo:: 4 × 900W

4Ω Stereo:: 4 × 600W

8Ω Stereo:: 4 × 400W

8Ω Bridge:: 2 × 1200W

Amplifier Specifications

Output Channels:: 4

Topology:: Class D

Operating Modes:: Stereo / Mono / Bridge, selectable per channel pair

Minimum Load:: 2Ω per channel / 8Ω bridged

Frequency Response:: 20Hz–20kHz, +0/−2dB at 10% rated power into 8Ω

THD+N:: Typical 0.01%

Signal-to Noise Ratio:: ≥103dB

Damping Factor:: Greater than 400 at 8Ω, 20Hz–200Hz

Crosstalk:: ≥80dB, 20Hz–1kHz

Input Impedance:: 20kΩ balanced

Input / Output Section

Input Connectors:: 4 x balanced XLR inputs

Channel Output Connectors:: 4 × speakON-type locking connectors

Bridge Output Connectors:: Through OUT 1 and OUT 3 using bridge-mode wiring

Controls

Front Panel:: 4 × channel-level controls and power switch

Rear Panel:: Separate operating-mode and filter switches for channel pairs 1–2 and 3–4

Low-Pass Filter:: Switchable 120Hz, channels 1–2

High-Pass Filter:: Switchable 120Hz, channels 3–4

Power Requirements

Operating Voltage:: 100–240 VAC ±10%, 50/60Hz

Power Supply:: Universal switch-mode power supply with active PFC

Cooling & Protection

Cooling:: Internal heat sinks and two variable-speed fans

Protection Circuits:: Short-circuit protection, power-supply overload protection, over-temperature protection, DC protection, and soft start

Status Indicators:: Signal, power, clip, and protection

Construction

Rack Space:: 1U

Dimensions (W x H x D):: 19 × 1.8 × 12.6 inches (483 × 45 × 319mm)

Net Weight:: 11 lb (5kg)

Warranty

3-Year Warranty:: 3-Year Warranty with Product Registration

DOWNLOAD

User Manuals

1.1 MB